tibbles



(No Model.) 2 sheets-sheet 1.

(J. E. TIBBLBS.

SEWING MACHINE.

No. 328,535. Patented Oct. 20, 1885.

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PEYERS, Phnto-Lima hw. Waminglon. D. C.

(No Model.) 2 Sheets-Sheet 2,. 0. E. TIBBLES.

SEWING MACHINE.

No. 328,535. Patented Oct. 20; 1885.

0mm 8 QZ/Zifiwse Y I 15 mm 09? $Z755WMdw UNITED STATES PATENT OFFICE.

CHARLES E. TIBBLES, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE TIBBLES MANUFACTURING COMPANY, OF SAME PLACE.

SEWING'-MACHINE.

SPECIFICATION forming part of Letters Patent No. 328,535, dated October 20, 1885.

Application filed March 11 1884. Serial No. 193,834. (No model.)

To all whom, it may concern.-

Be it known that I, CHAS. E. TIBBLEs, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved Sewing Machine; and I hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a bottom plan view of my improved machine, the hand-wheel being shown in horizontal section. Fig. 2 is an isometrical perspective view of the yokes and levers for operating the feed mechanism and the feed-mechanism parts in detail.

My invention relates to sewing -machine feeding mechanisms; and it consists in certain combinations and arrangements of mechanical devices, as will be hereinafter fully described, and specifically pointed out in the claims, whereby I obtain a four-motion feed in right lines.

In order that those skilled in the art may make and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A is the bedplate of the machine, and B is the driving-shaft. There is no novelty in the shuttle-operating mechanism. On the shaft B,at the point shown in Fig. 1,is secured by a set-screw, a, a cam, C, laid off as seen in Fig. 4. This cam reciprocates a yoke, D, provided with two straight faces, b b, against which the working-face of the cam C strikes at each revolution. A rectangular opening, a, in the yoke D provides for the passage of the driving-shaft through the yoke, and has beveled faces at d on its upper and lower edges, against which fit two bevelededged gibs, d d, which are held in position within openings a by means of a collar, d, having a set-screw, which is tightened up when the collar is passed along the shaft close up to the exterior vertical faces of the gibs, and thus the yoke and gibs are held to a proper position by the cam C and set-screw on the one side and the collar d and its set-screw on the other side. As the cam C revolves it causes the yoke D to reciprocate back and forth, sliding 50 on gibs d d, and gives a reciprocating movement to the arm D, which is pivoted at its end by a shouldered screw to bar C, provided with a longitudinal slot, 6, to receive the square head 6 of a pin, e, which journals or pivots bar C to bar E, which carries the yoke E, in which operates the cam F, which gives the feed-dog its movement in a vertical line.

Lying lengthwise beneath the bed-plate, near its edge, and secured in position by means of ears or guides f f, through which it slides, is a feed or stitch regulating bar, G, to one end of which is attached a set-screw, f, which pro-v jects upward through a slot, f, in the bed plate, and is provided with a binding-knob (not shown) on the upper side of the plate. The bar G has a free longitudinal movement equal to the length of slot f, and a square headed pin, 9, pivoted in bar G, as shown, and arranged to have the square head 9 of the pin 9 project into and snugly fit the slot e in bar C, has a like longitudinal movement as bar G is moved back and forth through the medium of knob f.

The barE is constructed as shown in detail in Fig. 4, and is provided at each end with shouldered slots hh, through which to hold it to the bed-plate rib h and allow it free reciprocation on gibs t i, having square exterior bearing-surfaces and tapered central openings, h, for the reception of screws 2", having ta- 8o pered heads h which enter taps in the bedplate rib h. The gibs, with the tapered central openings and the tapered screws, take up the lost motion due to the parts wearing, as it is obvious that the progression of the screws would fill out the gibs into the shouldered slots h h. A recess, j, in the side of bar E and two depending arms, a t, inclose three sides of a vertically-reciprocating yoke, E, the remaining side of the yoke resting against and 9c sustained by the vertical face of the bed-plate rib h. The feed-points 2" 6 are secured to the upper side of yoke E, and pass through the bed'plate immediately beneath the presserfoot.

Fixed to the driving-shaft by a set-screw, k, and surrounded by yoke E, is the cam F, whose office is solely to raise and lower the yoke E and the superimposed feed-points. In order to compensate for wear within the yoke 10o E, I provide on itsupper side a dovetailed section or piece, it, which may be forced nearer the opposite'interior face of the yoke by means of screws or screw it. n I I 7 It is obvious that as the cam O reciprocates yoke D and arm'D they in turn oscillate slot-.

ted bar around the square-headed pin 9 as a center, and thereby-the bar E is given a longitudinal reciprocation in one direct line, which is a highly important advantage.

The ordinary feed-bars are hinged at one end to the bed-plate rib, and such construction causes the heel of the feed-dog to enter the goods first, and as the feed rises to a level the heelteeth move a trifle toward the operator and carry the goods with them, thus scratching or marring and producing other bad effects.

The shapes of the cams '0 and F are practically the same on their-working-faces as the cams shown in the patent issued to me March 13, 1883, and numbered 27 4, 057-that is to say,

they are divided'into fourths, or nearly so. For

illustration, rotate the driving-shaft one-fourth of a revolution, and cam F has lifted yoke E until the feed-points engagewith .the goods.- During the next quarter-revolution cam F runs i on the same radius, and is inoperative, except to hold the feed-points to their engagement with the goods, while cam G forces yoke. D, reciprocates bar D, and vibrates the slotted bar 0, whereby bar E forces yoke E in a direct horizontal line, and carrying with it the feeddog and the goods. The opening in yoke ,E is sufliciently elongated so it can slide over cam F when bar E is moved. During the next tive and yoke D and bar D remain stationary olution of the shaft the cam 0 again becomes atone end of the strokes, while cam F brings yoke E and the feed-points down to their lowest point. In the final or fourth quarter rev operative,and through the medium of yoke D and other mechanism described yoke E, is made. to slide to the position from which it started and ready to rise with the feed-points andagain engage the goods.

From this description in detail it will be seen that I provide a fourmotion feed, the motions being absolutely in straight linesat right angles, and that complete means are shown pensated.for'.. r

It is obvious that the length of the feed will depend upon the length of the movement given a to yoke E, which carries the feed-points. The llength of this movement is governed by position of the square head g of pin 9 within slot 6 in bar G'. The position of the head in the slot is changed at will by sliding bar G back and forth by means of knob, (not shown,) and this changing ofthe head g, or center of motion of bar G, lengthens or shortens the stitch at will.

I am aware that afour-way rectilinear feed has heretofore been made; but in such cases the feed-barhas beenactuated in one or more of the directions by a spring or springs. The use of springs precludesthe possibility of feeding in opposite direct-ions in exactlythe same time which is accomplished in my invention, forthe reason that a spring is not sufficiently strong to move the goods, and if, such a spring Having described my invention, what I claim, i

and desire to secure by Letters Patent, is

I 1. In a four-way feed for sewing-machines,

1 the feed-bar E, in combination with ways for supporting it, a drivingesha ft, B, connecting devices, as bars Dand G,and acamtomove I said feed-bar positively in direct linesto and v i from the operatorgand, feed-pointsactuated in a linecrossing the line of travel of the feedzbar, substantially as set forth. v

one-quarter revolution the cam O isinopera- 2. The cam C, yoke D, having openinga,

- gibs d, shaft B, andcollard, in combination 1 with arm D, pivoted to slotted arm O,'squaref headed pin 6, and barflE, all constructed, ar- Iranged, and operatedtas set fQ th. r

3. The bar: E, provided with shouldered ing a tapering central recess,,tapering-headjed screws h, and the bed-plate rib h, all .,con-, structed and arranged .to operate as and for the purposeset forth. i i O. E. TIBBLES.

\ Witnesses:

A. J SwARTs,

i J. SMITH.-

slots h, in combination with the gibs t' hav-jv 

